What is the price of the painter Chen Boxi's calligraphy with four feet and seven characters?

Mr. Chen Boxi is a famous painter and calligrapher in Gansu, who just died in May some time ago. This will raise the price of his works. The price gives you a reference: 20 14 On July 29th, a four-foot seven-character couplet of Mr. Chen Boxi's seal script was valued at 1-20000. It should be around 20,000-30,000 now.